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STC S - Annual Report 2015

The Scientific Technical Committee Surfaces (STC S) had two meetings in 2015 - in Paris, France, on February 19 and in Cape Town, South Africa on August 27. The STC S meetings were attended by 113 participants in Paris and 60 participants in Cape Town.

During the STC S meetings future keynote papers and cooperative work were discussed. In particular G. Tossello presented the progress on a round robin related to optical measurement of polymer surfaces.

At the February 19 meeting, 6 short technical presentations were given followed by a lively discussion:

1. Reduction of friction and wear in the crank mechanism of internal combustion engines by the finishing process (Welzel, Karpuschewski).
2. Control biodegradation kinetics of magnesium-calcium implant by tuning surface integrity via burnishing (Guo).
3. Reference structures fabricated by Focused Ion-Beam Techniques (Sai, Brand, Koenders, Bosse)
4. Fatigue strength of diamond coating-substrate interface assessed by inclined impact tests at ambient and elevated temperatures (Bouzakis, Bouzakis, Skordaris, Charalampous, Kombogiannis, Lemmer)
5. Injection printing of Polycaprolactone scaffolds dopped with antibacterial silver nanoparticles. (Michailidis,Tsouknidas,Pantazopoulos,Papadopoulos).
6. Surface treatment of metals by means of nonlinear laser lithography. (Orazi, Guilitsky, Luchetta, Fortunato)

Next to this, Prof Leach initiated a challenging discussion by a presentation called Discussion on limits and usefulness of standardization. The main point raised was that standards should not be informative, but rather provide normative mandates.

At the August 27 meeting, 6 short technical presentations were given followed by a lively discussion:

1. Process chain analysis for computer controlled ultra-precision polishing of 3d-structured surfaces (C.F. Cheung).
2. Study of ejection forces in micro injection molding as a function of mold surface finish obtainable by micro milling ( Lucchetta, Parenti, Masato, Sorgato, Annoni)
3. Spatial nano-vibrator assisted fly-cutting-servo diamond machining of microand nanostructured surfaces
4. Freeform Surface Representation (Jiang, Scott)
5. Fabrication of patterned superhydrophobic surface using a commercial laser printer (Chun, Ngo)
6. Ultra-precision machining of micro-scale gratings on curved optical surfaces.(Owen, Troutman, Davies)

Next to this, Prof C. Brown initiated a challenging discussion by a presentation called Surface Metrology
Scientific or Experiential Discipline?
C. Brown proposed the following points for discussion of how surface metrology have some basic principles that might be the basis for making it a scientific, rather than an experiential discipline. First – how surface metrology provides value: 1) Discriminate good and bad surfaces (standards, calibrations, repeatability and reproducibility) 2) Correlate roughness and performance (support production engineering), and 3) Correlate roughness and processing (support manufacturing engineering).
He then proposed that discrimination and correlations require three things: 1) Characterizations of the appropriate geometrical aspects of the surface (e.g., slope, area, curvature), 2) Characterizations at the appropriate scale, and 3) Topographic measurements containing the appropriate scales with sufficient fidelity.
There was a lot of interest in this topic and a rich discussion followed.

Details of the technical presentations and discussions at the 2015 STC S meetings can be found in the complete minutes of these meetings, prepared by Professor B. Mullany, technical secretary of STC S. The minutes including annexes are available to CIRP members at the CIRP website.

Next to this, the final report on the round-robin on roughness specimen is published in the 2015 STC-S section of the website as separate document

The 2015 keynote paper of STC S entitled Calibration and verification of surface topography measuring instruments” was presented by prof. R. Leach preceding the second half of the S-paper session of the General Assembly in Cape Town at August 25.
R. Leach coordinated this paper with C.L. Giusca, H. Haitjema, C. Evans, and X.J. Jiang. The keynote paper was well received by the assembly and the STC S.

The paper session of STC S took place during the CIRP general Assembly part 1, at August 24 and 25. A total of 10 high quality papers were presented and good discussions followed all papers.

Dr. Han Haitjema, Chairman of STC S